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10-26-2017, 12:47 PM
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Join Date: Jun 2007
Location: Beaumont
Posts: 762
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6.7 cummins
My 2010 6.7 Cummins coolant temperature seems to be running to cool all I'm getting is 83 degrees Celsius. I'm pretty sure that my mechanical gauge used to be in the middle now it's below. Any ideas would be apreciated
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10-26-2017, 12:51 PM
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Join Date: Jul 2011
Posts: 115
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Winter time? I'm sure that doesn't help but my coolant temp on a 5.9 fluctuates quite a bit with outside temperature
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10-26-2017, 12:58 PM
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Join Date: Aug 2009
Location: Oz
Posts: 2,104
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Your thermostat is probably stuck open. My 2010 runs up to 100 then drops down to 92-93 when the thermostat opens.
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10-26-2017, 01:28 PM
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Join Date: Jul 2016
Posts: 216
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I had a ranger with a stuck open thermostat, sure sucked running barely warm at -30c! Should be a cheep fix if is the issue.
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10-26-2017, 01:37 PM
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Join Date: Jun 2014
Location: Peace River, BC
Posts: 630
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Work truck just had this issue. Got thermostat replaced, no fix. Back to shop - head gasket
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10-26-2017, 04:17 PM
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Join Date: Aug 2017
Location: Edmonton
Posts: 294
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The mechanical gauges are dummy gauges. If your PC is reading a bad temp, that could be an issue but the mech's are basically for too low, good, and too high. They're a horrible indicator.
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10-26-2017, 04:24 PM
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Join Date: Sep 2015
Posts: 276
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Hate to say it but sounds like your head gasket is blown out. Had this happen on my 6.7 Cummins, you could try and replace the thermostat first and cross your fingers it’s that
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10-26-2017, 08:07 PM
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Join Date: Mar 2010
Location: Sylvan Lake
Posts: 251
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I would replace your thermostat (very simple) on your engine. See if that helps. Depending on outside ambient temperature you can also get a winter front to put in front of your rad and help keep that cold air from passing through your rad. I wouldn’t say your head gasket is blown.
DR
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10-26-2017, 08:24 PM
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Join Date: Dec 2012
Location: Millarville,alberta
Posts: 493
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If your head gasket was blown you would be losing coolant and your truck would be blowing white smoke
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Ya just go out n ya give'r
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10-27-2017, 03:55 AM
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Join Date: Aug 2009
Location: Oz
Posts: 2,104
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Quote:
Originally Posted by ChickakooKookoo
The mechanical gauges are dummy gauges. If your PC is reading a bad temp, that could be an issue but the mech's are basically for too low, good, and too high. They're a horrible indicator.
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You realize these trucks give you a digital temp readout in the multi function display right?
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10-27-2017, 05:49 AM
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Join Date: Jan 2012
Location: Strathmore, AB
Posts: 694
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Wouldn’t condemn a head gasket based off this. Running a whole fleet of 6.7s and this is normal due to outside temp. My truck (5500) sits at 83-85 once warmed up all day. In the summer this is about 95.
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10-27-2017, 06:03 AM
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Join Date: Jul 2015
Posts: 903
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Head gasket would run hot or mimic it running hot. You can buy different temp thermostats. I would buy a hotter one for winter so you have good heat and if you do lots of towing in summer you can put a cooler one in.
Sent from my iPhone using Tapatalk
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10-27-2017, 06:25 AM
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Join Date: Aug 2017
Location: Edmonton
Posts: 294
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Quote:
Originally Posted by Coiloil37
You realize these trucks give you a digital temp readout in the multi function display right?
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Yup that's why I said if the PC is reading a bad temp you have a problem. Was just pointing out that you shouldn't trust the mechanical gouges.
Sent from my iPhone using Tapatalk Pro
__________________
I am unique! Just like everybody else.
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10-27-2017, 09:04 AM
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Join Date: Jun 2007
Location: Beaumont
Posts: 762
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6.7
The pc is reading 83 c drove it at 80 km in fourth gear for 20 km never went over stop at lights reads 79 c
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10-27-2017, 10:52 AM
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Banned
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Join Date: Nov 2013
Location: Manitoba
Posts: 1,529
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Quote:
Originally Posted by Husty
I had a ranger with a stuck open thermostat, sure sucked running barely warm at -30c! Should be a cheep fix if is the issue.
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I would like to drive that ranger with a 6.7 Cummins in it!
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10-27-2017, 11:59 AM
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Join Date: Nov 2011
Location: Grande Prairie AB
Posts: 294
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82*C is 180*F and that’s what the 6.7’s come with no? You could try a 88* or 90*C t-stat which is a 190-195*F stat however I would talk to Dodge first and see if there might be a bulletin about putting in a hotter t-stat.
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10-28-2017, 04:08 PM
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Join Date: Jun 2007
Location: Beaumont
Posts: 762
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6.7
Well easy change on thermostat on this 6.7 isn't the easiest the crossover tube on the ecg is a bugger to remove the clamps that are on there are very hard to remove so my project will need to wait tell tomorrow to finish.Fingers crossed
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10-30-2017, 01:50 PM
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Join Date: Sep 2012
Posts: 6,204
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You might try a winter front on truck keeps the operating temperature somewhat higher, you also get better milage. A piece of cardboard with 6 inch circle cut out in middle makes good poor mans winter front.
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10-30-2017, 01:52 PM
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Join Date: Jul 2016
Posts: 216
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Quote:
Originally Posted by gtr
I would like to drive that ranger with a 6.7 Cummins in it!
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I wish it was a 4.0L gas job. I miss my small truck.. Had to go full size. I have seen a ranger with a 4BT in it, guy said it got about 60mpg.
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10-30-2017, 10:06 PM
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Join Date: Apr 2008
Location: In the Rockies
Posts: 2,933
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my 09 always runs left of middle..unless it's over 30 and I'm pulling my trailer uphill then it goes right of middle
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